Kheel made the same point a decade later, in a New York magazine cover story arguing against another fare increase: “Any balanced analysis will surely prove that the taxpayer actually pays, for every person who chooses to drive to and from work in his own car, an indirect subsidy at least 10 times as great as the indirect subsidy now paid the mass-transit rider.”

The thread running through these essays is a concept familiar to all economists: the problem of negative externalities, costs that accrue when the self-interested actions of one person leave bystanders worse off.

http://www.livablestreets.com/people/Aaron_B Aaron Bialick

Mike – from that article:

“Buses are always free, because the time saved when passengers aren’t fumbling for change more than makes up for the lost fare revenue.”